|Publication number||US4958404 A|
|Application number||US 07/252,335|
|Publication date||Sep 25, 1990|
|Filing date||Sep 30, 1988|
|Priority date||Oct 10, 1987|
|Also published as||DE3734313A1|
|Publication number||07252335, 252335, US 4958404 A, US 4958404A, US-A-4958404, US4958404 A, US4958404A|
|Original Assignee||Hergeth Hollingsworth Gmbh|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (9), Referenced by (8), Classifications (13), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention relates to a card for producing fibrous textile webs and random webs of natural or synthetic fibers. The card comprises a series of cylinders clothed with metallic wire which rotate in a predetermined sense with respect to each other. A plurality of working rollers are coordinated with the cylinders for working the fibers. A roller and feed plate feed the fibers and at least one takeoff roller takes off the fibers. The cylinders and the workers are covered by trough-shaped plates.
It has been known to use closed undercasings in cards such as random web cards, under carding cylinders and licker-in roller to prevent accidental air movements and negative influences. Further, dirt deposits on the driving units frequently arranged beneath the rollers are prevented. It also has been known to use interrupted undercasings with slots to remove trash particles, etc., beneath rollers within the licker-in range when the rollers have teeth points inclined in the sense of rotation (positively inclined metallic wire).
With the use of arcuate undercasings which are produced more and more accurately in order to obtain a more uniform final product, the optimum air amount may not be available for the formation of the air current entrained by the roller when operational conditions change, i.e. changes in fiber material,
In the absence of sufficient air, the system absorbs air in an uncontrollable manner. An unequal pressure distribution is caused over the working width from one roller end to the other. A nonuniform fiber distribution is produced accordingly. On the other hand, the presence of too much air may entail a formation of alleys, i.e. streaks and thin places in the material.
Accordingly, an object of the present invention is to provide a card having a regulation and control of the air balance around the rollers.
The invention is characterized in that the troughshaped cover of the cylinders and/or workers is formed of a series of trough sections arranged in spaced relationship which are adapted to be selectively opened.
If the roller cover is designed this way, a control of the optimum air amount for the cylinders and/or rollers may be easily performed uniformly over the working width. An optimum adjustment of the air current causes a stabilization and a uniform distribution of the material entrained by the rollers. The quality of a nonwoven product or of another fibrous web may be substantially improved. At the same time, the fiber throughput may be increased and an optimum quality of the fibrous web may be obtained simultaneously.
According to another feature of the invention, the trough sections are adapted to be tilted outwardly from the cylinder or roller. The trough sections which may be tilted away, are suitably adapted to be opened to a nearly radial extension. The angle of opening of the trough sections may be limited by a stop. The opening of the trough sections may be controlled individually and/or in common, e.g. by groups.
The construction designed to carry out the invention will hereinafter be described, together with other features thereof. The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invention is shown and wherein:
FIG. 1 is an elevational and schematic view of an embodiment of a card of the invention; and
FIG. 2 is a roller, in particular a worker, comprising the cover of the invention, in detail and schematically.
Referring now in more detail to the drawings, a random web card, designated generally as 1, is illustrated which comprises an undercasing intake 2 which also may be an intake roller, five carding cylinders K1 to K5, a drum C and seven coordinated workers or clearer rollers 3 to 9. A centrifugal-dynamic web formation means 11 is followed by take-off rollers 13 and 14. If necessary, a stuffing means 15 or 16 is provided on the upper take-off roller or on both of them. As can best be seen in FIG. 2, a division of the undercasing 18a and 18b is preferably provided near workers and can also be provided near carding cylinders K1 to K5 7, 8, and 9 and/or near drum C. Between casing parts 18a and 19b, the cover of roller 8 is formed of a plurality of trough sections 20a, 20b, 20c, 20d, 20e arranged in series. The sectional portions are designed to be adjustable and adapted to be opened. The undercasing for the other worker rollers is constructed likewise. The longitudinal sides of each trough section 20a, 20b, 20c, 20d, 20e are provided with outwardly directed angular elements 21, 22. The angular elements of two adjacent sectional portions form an outwardly flared gap 23. The trough sections are pivotally supported about a shaft 26 at an edge situated rearwardly in the sense of rotation 25 of roller 8. The trough sections are adapted to be tilted away and opened to a nearly radial extension such as indicated by positions in short lines. The angle of opening of the trough sections may be limited by a stop 26a. For the formation of the enlarged gap 23, the angular element 22 is directed inwardly beyond 90 degrees at the leading edge of the trough section, as seen in the sense of rotation 25.
Due to the trough sections 20a, 20b, 20c, 20d, 20e adapted to be opened more or less, the air balance at the workers may be regulated according to the prevailing demand. By the arrangement of the axis of rotation 26 and the design of the trough sections, the setting angle may be selected within a wide range. Since several workers are provided with the controllable undercasing, the air balance may be controlled at one or several sites. Their movements may be controlled individually and/or in common. The teeth of the metallic wire of the workers are always directed opposite to the sense of rotation. Due to the various possibilities of control, the air balance may be regulated for the plurality of carding rollers in such a way that a uniform pressure distribution may be maintained which ensures a uniform fiber distribution.
While a preferred embodiment of the invention has been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3685099 *||Sep 3, 1970||Aug 22, 1972||Jenkins Metal Shops Inc||Spark preventing card screen|
|US4008511 *||Sep 3, 1975||Feb 22, 1977||Kabushiki Kaisha Toyoda Jidoshokki Seisakusho||Device for adjusting position of taker-in under casing in card|
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|US4523350 *||Jun 28, 1983||Jun 18, 1985||Spinnbau Gmbh||Carder for manufacturing non-woven, formed fabric from fibrous substances|
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|US4583267 *||Jul 5, 1985||Apr 22, 1986||Ernst Fehrer||Apparatus for making a fibrous web|
|US4615080 *||Dec 19, 1984||Oct 7, 1986||Hergeth Hollingsworth Gmbh||Method and apparatus for making a web from staple fibers|
|US4797978 *||Jul 21, 1987||Jan 17, 1989||Marcello Giuliani||Multiple-card with transferring, carding and cleaning cylinder|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5226214 *||Jun 25, 1992||Jul 13, 1993||Nicola Napolitano||Drum carding machine for making non woven fabrics and natural or synthetic fiber webs|
|US5313688 *||Sep 17, 1991||May 24, 1994||Trutzschler Gmbh & Co. Kg||Fiber waste separator including carriers, movable covers, and suction hood|
|US5655262 *||Nov 3, 1995||Aug 12, 1997||Mtm-Modern Textile Machines Ltd.||Apparatus for cleaning fibers|
|US5771541 *||Mar 31, 1997||Jun 30, 1998||MTM--Modern Textile Machines Ltd.||Apparatus for cleaning fibers|
|US5974628 *||Mar 13, 1997||Nov 2, 1999||Giuliani; Marcello||Card for textile fibers with carding cylinders cooperating in series|
|US6732412 *||Sep 30, 2002||May 11, 2004||Thibeau||Method and installation for the production of a condensed nonwoven and condenser device|
|US7111366 *||Aug 5, 2004||Sep 26, 2006||Akiva Pinto||Machine for making a non-woven fibrous web|
|US20060026801 *||Aug 5, 2004||Feb 9, 2006||Akiva Pinto||Machine for making a non-woven fibrous web|
|U.S. Classification||19/98, 19/105, 19/95|
|International Classification||D01G15/70, D01G15/34, D01G15/52, D01G15/32|
|Cooperative Classification||D01G15/70, D01G15/34, D01G15/52|
|European Classification||D01G15/52, D01G15/70, D01G15/34|
|Sep 30, 1988||AS||Assignment|
Owner name: HERGETH HOLLINGSWORTH GMBH, D-4408 DUELMEN, FEDERA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LASENGA, WERNER;REEL/FRAME:004948/0811
Effective date: 19880926
Owner name: HERGETH HOLLINGSWORTH GMBH, D-4408 DUELMEN, FEDERA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LASENGA, WERNER;REEL/FRAME:004948/0811
Effective date: 19880926
|May 3, 1994||REMI||Maintenance fee reminder mailed|
|Sep 25, 1994||LAPS||Lapse for failure to pay maintenance fees|
|Dec 6, 1994||FP||Expired due to failure to pay maintenance fee|
Effective date: 19940928